Sea-Doo GTI LE 2002 717 720 Rotax Charging/Running problem

[Gog]

Hi guys,

first of all I'm a newbie so don't be too rude on me if something goes terribly wrong on this post!
I tryed to search for a similar problem through the forums but couldn't find one very exact to mine...

So to the problem, I'm having issues with my GTI LE -02 717 rotax.
It starts perfectly on trailer, revs up normally, nothing wrong. When we measured the charging system, I noticed that it doesn't charge.
I reconnected the regulator and measured the stator. Stator produces only 2.5volt AC at idle. The Strange thing is, that the resistance seems to be fine. 0.7ohm between yellow wires. Is it possible that the magnets are dead inside the flywheel (or completely missing??) or a short to ground somewhere?
I assume the stator should be fine, while the resistance is ok?

There was alot of rust on the flywheel and the chassis of it, because there had been salt water on somepoint of previous owners inside there.. (rings bells to an electricity problem )

I have already replaced new spark plugs (BR8ES), a new start (old was just bad and very rusty because of the salt water inside) and a new AGM battery.

Theres an photo attached also to see the condition of the flywheel assembly.

I'm not sure is this connected to the electricity problem, but also it is very hard to get running in water. On trailer it starts up perfect but when I get it into the water it kind of bogs down and dies.
I've got new gas, 2t oil straight in the tank, no system working for that anymore.. Top end has been rebuild with the lower block.

Any suggestions guys? I would be pleased from any help.

 

[mwat65]

Have you checked compression on your motor ? If it’s not charging your going to need a new stator and possibly a rectifier. Pull the flywheel so you can get a look at that stator. By the look of the flywheel and housing area it’s probably rusted up.

 

[Gog]

Have you checked compression on your motor ? If it’s not charging your going to need a new stator and possibly a rectifier. Pull the flywheel so you can get a look at that stator. By the look of the flywheel and housing area it’s probably rusted up.

Okey, that's the plan for the night today. What is the best tool to pull out the flywheel? I don't want to spend +100 euros on it..
Compression should be okay. But I will check it to be 100% sure. It starts like a dream and runs like a dream on land..

 

[mwat65]

UNIVERSAL FLYWHEEL PULLER TOOL SEADOO,YAMAHA,KAWASAKI,POLARIS,SEADOO JET SKI | eBay

 

[mwat65]

This is the one I use.

 

[Gog]

This is the one I use.

Thanks! I have to order that one.

 

[mwat65]

Was the 2.5 volts from your battery while running ?

 

[Gog]

The 2.5 volts AC were measured from the two yellow wires coming from the stator to the rectifier while idle. When revin a littlebit, went around 4-5Vac.
The battery voltage was around 12 volts at that point (depending how long we ran the motor, the voltage dropped ofcorse) and that was measured from the battery. Also the black and red wires didn't give the wanted ~14V charg.

 

[mwat65]

Your battery should read 13-14 volts at I think 4000 rpms. If your only getting 12 your not charging at all . Check the stator plug for corrosion also. Sounds like a bad stator. I would replace the stator and rectifier although the 720 rectifiers don’t go bad that often . A visual of the stator will tell you a lot. Check the pins in your stator plug. I had them break off.

 

[Gog]

Your battery should read 13-14 volts at I think 4000 rpms. If your only getting 12 your not charging at all . Check the stator plug for corrosion also. Sounds like a bad stator. I would replace the stator and rectifier although the 720 rectifiers don’t go bad that often . A visual of the stator will tell you a lot. Check the pins in your stator plug. I had them break off.

Yes, we'll do that. Appreciate your help alot! Thank you m8.

 

[Gog]

Okey so we got the flywheel off, the magnets still have their power, the magneto should be okey as in sight and some mesures done.. what the he...?

Whats the trick here..

Tomorrow I will have to double check that none of the connector pins are loose from the wires..

 

[mwat65]

That’s looks like an aftermarket stator. Also don’t forget the rectifier.

 

[Gog]

The stator was Denso Japan made and we did the measures before rectifier straight from the stators yellow wires..

We also cleaned the flywheel + magnets from rust and so on...

Does the oem stator cause a problem like this if the covering of the copper wiring is faulty "inside" or under the "main ring" of the copper rings?

I'm sorry but i don't know whats the correct name of the "clearcoat" on the copper wires. But if that is broken from one of them could that cause the carge of only 2.5-4Volts?

 

[mwat65]

I’m going to say the stator is bad. Hopefully someone else will chime in with their opinion on this.

 

[Gog]

Yeah, I ordered new stator, flywheel, regulator. Lets see if it changes something.

 

[mwat65]

Yes. It should fix your charging problem plus have the piece of mind of knowing you have an all new charging system. Make sure your stator goes back in the same place. It controls your timing .

 

[Gog]

The problem is gone with a bigger battery, but the new parts havent arrived yet. So I'll come back with the charging problem later and tell how it ends up.